3M 7000006132 3M™ Cold Shrink Insulator 8426-9, 2/0 AWG-250 kcmil (70-125 mm²), 10/case

The 8426-9 tube ships with a 1.185 in (30.1 mm) inner diameter and recovers down to 0.547 in (13.9 mm). Anything the finished splice or lug barrel measures across has to fall inside that window, so measure over the insulation at the largest point (usually the connector) before you cut. In metric conductor terms the tube is sized for 70 to 125 mm2 single-conductor cable.

The 8426-9 is a 9 in (228.6 mm) relaxed tube and it is rated to cover connectors up to 5.0 in (127.0 mm) long. That leaves roughly two inches of overlap onto the cable insulation each side, which is what does the sealing. If your barrel is longer than 5 inches, this tube is the wrong length for the joint.

No. The 8426-9 is a 1 kV class insulator for non-shielded power cable only, rated to 1000 volts. Shielded MV splices need a shielded cold shrink splice body with a stress control layer and a reconstructed shield path, which this plain EPDM tube does not have.

No heat and no tools. Cold shrink recovers by pulling the internal core strip out, so the tube contracts onto the joint on its own. That makes it the choice in tanks, vaults, and any space where an open flame is not allowed, unlike heat shrink tubing.

No, they do different jobs and are usually used together. The Burndy YS6C is a Hylink long barrel copper compression splice, a metal connector that is crimped to join two conductors mechanically and electrically. The 3M 8426-9 is a cold shrink EPDM rubber tube that provides primary insulation over a completed splice on solid dielectric insulated wire and cable rated to 1000 volts. On a typical 1 kV joint you crimp the conductors with a compression connector, then slide the 8426-9 over the barrel and pull the core out to shrink it down for insulation and sealing.

The EPDM rubber body of the 8426-9 operates from -40 to 90 degC (-40 to 194 degF), so it holds through winter cold and conductor operating heat. The compound contains no chlorides or sulfur, which matters where those would attack an adjacent conductor or lug.

Primary insulation of solid dielectric insulated wire and cable splices is the main use, but the same tube seals terminal lug barrels, conduit couplings, and conduit-to-cable breakouts. It is a single-conductor cover, so a three-phase splice takes three tubes.

They do different halves of the same job. The Burndy YS6C Hylink long barrel copper compression splice is the mechanical connection that joins the two conductors; the 3M 8426-9 is the insulating and sealing cover that goes over a connector once it is crimped. On a long barrel connector, check the barrel against the 5.0 in maximum connector length this tube covers.

No. The 8426-9 is listed for aluminum conductor, non-shielded power cable from 3/0 AWG (70 mm2) to 246 kcmil (125 mm2) and single conductor use, but it only insulates and seals the joint; the electrical connection still comes from a separate connector. The Burndy YS6C Hylink is a copper compression splice, so for aluminum conductors you would select a connector rated for that conductor material and then cover the finished joint with the 8426-9.

3M part 7000006132 is a case of 10 black tubes. It is RoHS 2011/65/EU compliant without exemption and made in the United States, which covers the two boxes most institutional and government submittals want ticked.

Aluminum power cable is what the 8426-9 is listed against, and because the tube only insulates and seals over the outside of the joint, the conductor metal underneath does not change how it recovers. What governs fit is the finished diameter, which must land between 1.185 in relaxed and 0.547 in recovered.

The Burndy YS6C Hylink is a compression splice, so it is installed with a crimping tool and the die set matched to the barrel. The 3M 8426-9 cold shrink insulator installs with no tools at all: it is positioned over the joint and the supporting core is pulled out so the EPDM rubber tube recovers onto the cable. That tube also carries a -40 to 90 degC (-40 to 194 degF) operating range for outdoor and unconditioned locations.